chainstructural.cs

使用C#程序将23个常用设计模式进行列表显示

using System;
using System.Windows.Forms;
using System.Text;

namespace DesignPattern.ChainStructural
{
    class ChainStructural : AbstractPattern
    {
        public static void Run(TextBox tbInfo)
        {
            s_tbInfo = tbInfo;
            s_tbInfo.Text = "";

            // Setup Chain of Responsibility 
            Handler h1 = new ConcreteHandler1(); 
            Handler h2 = new ConcreteHandler2(); 
            Handler h3 = new ConcreteHandler3(); 
            
            h1.SetSuccessor(h2); 
            h2.SetSuccessor(h3); 
            
            // Generate and process request 
            int[] requests = {2, 5, 14, 22, 18, 3, 27, 20};
            foreach (int request in requests)
            {
                h1.HandleRequest(request); 
            } 
            
            // Wait for user 
            //Console.Read(); 
        }
    }
    
    // "Handler" 
    abstract class Handler 
    {
        protected Handler successor; 
        public void SetSuccessor(Handler successor)
        {
            this.successor = successor; 
        }
        public abstract void HandleRequest(int request); 
    }
    
    // "ConcreteHandler1" 
    class ConcreteHandler1 : Handler 
    {
        public override void HandleRequest(int request) 
        {
            if (request >= 0 && request < 10) 
            {
                DesignPattern.FormMain.OutputInfo("{0} handled request {1}", this.GetType().Name, request); 
            }
            else if (successor != null) 
            {
                successor.HandleRequest(request); 
            }
        }
    }

    // "ConcreteHandler2"
    class ConcreteHandler2 : Handler 
    {
        public override void HandleRequest(int request) 
        {
            if (request >= 10 && request < 20) 
            {
                DesignPattern.FormMain.OutputInfo("{0} handled request {1}", this.GetType().Name, request); 
            }
            else if (successor != null) 
            {
                successor.HandleRequest(request); 
            }
        }
    }
    
    // "ConcreteHandler3" 
    class ConcreteHandler3 : Handler 
    {
        public override void HandleRequest(int request) 
        {
            if (request >= 20 && request < 30) 
            {
                DesignPattern.FormMain.OutputInfo("{0} handled request {1}", this.GetType().Name, request); 
            }
            else if (successor != null) 
            {
                successor.HandleRequest(request); 
            }
        }
    }
}